x
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<html>
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<head>
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<meta charset="utf-8">
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<style>
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div {
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margin: 20px;
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width: 150px;
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padding: 10px;
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height: 70px;
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border: 2px solid black;
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outline: 2px solid red;
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outline-offset: 15px;
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}
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</style>
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</head>
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<body>
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<p><b>注意:</b> Internet Explorer 不兼容 outline-offset属性.</p>
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<div>这个 div有一个轮廓边界15 px边境外的边缘。</div>
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</body>
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</html>